Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx agentmods add skills/tacticlaunch/mcp-linear/add-mcp-toolnpx skills add tacticlaunch/mcp-linear --skill add-mcp-toolgit clone --depth 1 https://github.com/tacticlaunch/mcp-linearWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/tacticlaunch/mcp-linear/add-mcp-tool)<a href="https://agentmods.dev/skills/tacticlaunch/mcp-linear/add-mcp-tool"><img src="https://agentmods.dev/badge/skills/tacticlaunch/mcp-linear/add-mcp-tool.svg" alt="Measured on agentmods" height="20"></a>What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5 | $0.00036 | $0.00303 |
| Opus 5 | $0.00018 | $0.00151 |
| Sonnet 5 | $0.00007 | $0.00061 |
| Haiku 4.5 | $0.00004 | $0.00030 |
Grade A, and why
add-mcp-tool scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
Use this workflow when adding a tool to mcp-linear.
Goal
Implement a Linear capability end-to-end so the MCP surface, runtime behavior, and docs stay aligned.
Workflow
- Inspect the existing domain files under
src/tools/definitions,src/tools/handlers, andsrc/services/linear-service.tsto find the closest pattern. - Check whether the capability already exists in
LinearService. - Inspect
@linear/sdkbefore writing new GraphQL. - Implement or update the service method so it returns normalized plain objects.
- Add or update the tool definition with explicit required fields, enums, nullability, and numeric constraints.
- Add or update the handler so it validates, delegates, and logs failures.
- Add or update the type guard in
src/tools/type-guards.ts. - Register the tool in both index files.
- Update
TOOLS.md. - Add focused tests in
src/__tests__. - Run
npm testandnpm run build.
Project-specific reminders
- Prefer SDK methods first.
- If you use direct GraphQL because the SDK is stale or missing support, document why.
- Keep handlers thin.
- Be exact about nullable update semantics and output schema fidelity.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 5d ago First seen · 32 lines · 36 tokens per session scan A 94e5c7f85e83
add-mcp-tool is a skill published in the GitHub repository tacticlaunch/mcp-linear (146 stars, last pushed 6d ago), licensed MIT. It adds 36 tokens to every session and 303 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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